Glenn Turner Posted October 24, 2020 Report Share Posted October 24, 2020 Hi, I am currently doing a university project using ventsim and i am required to test the time that it takes for fume to be cleared from a drive with the fan on and the fan off. The program works great with the fan turned on, however when i try to run the simulation with the fan turned off, i get no results at all. All of the spread mix contaminants are zero. Do you have any ideas why this is happening? Regards Glenn Quote Link to comment Share on other sites More sharing options...
Glenn Turner Posted October 24, 2020 Author Report Share Posted October 24, 2020 So i applied a low static pressure to move the gas and that fixed the issue. thanks Glenn Quote Link to comment Share on other sites More sharing options...
Martin Griffith Posted October 26, 2020 Report Share Posted October 26, 2020 Hi Glenn, you won't get contaminant or gas movement in an airway with no flow. So if there is zero flow, then you need to create some. If you are using the steady-state solver for this and you have a little flow, you could reduce the setting in Settings | Simulation | Airflow | Allowable Air Error, which will reduce the threshold below which contaminant transport is not calculated. Quote Link to comment Share on other sites More sharing options...
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